Ferroelectric capacitor circuit for sensing hydrogen gas

Details Ferroelectric capacitor circuit for sensing hydrogen gas Ferroelectric capacitor circuit for sensing hydrogen gas

2005-09-23

2008-03-18

Baumeister, B. William (Department: 2891)

Active solid-state devices (e.g., transistors, solid-state diode

Field effect device

Having insulated electrode

C257S241000, C257S295000, C257SE21664, C257SE23075, C438S003000

Reexamination Certificate

active

07345331

ABSTRACT:
A ferroelectric capacitor circuit for sensing hydrogen gas having a closed integrated circuit package, a ferroelectric capacitor within the closed integrated circuit package, the ferroelectric capacitor having a bismuth oxide based ferroelectric layer being able to absorb hydrogen gas that is within the closed integrated circuit package, absorbed hydrogen gas chemically reducing a portion of the bismuth oxide based ferroelectric layer into bismuth metal, the ferroelectric capacitor having a ferroelectric voltage, the ferroelectric voltage having a voltage strength, and means for measuring a decrease in the voltage strength of the ferroelectric voltage of the ferroelectric capacitor.

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